كلمة اليوم Today's Word
Exergy (Noun)
Pronunciation: ['ek-sêr-jee]
Definition 1: Potential energy to do work; the useful capacity of an energy source to perform work.
Usage 1: Exergy is almost exclusively used in discussions of thermodynamics. The exergy of a tank of fuel is how much work it is capable of doing, e.g. heating a house to 72° in mid-winter. It we burn that fuel to heat a room, the amount of energy remains the same, but since it has been converted to heat and dispersed throughout the room, its ability to do useful work (exergy) has been radically reduced. The adjective is "exergetic."
Suggested usage: In its broadest meaning, today's new word refers to potential energy to do work as opposed to actual energy. So we could characterize someone as "exergetic" who has potential unused energy or if they waste energy. "Rose Marie has enough exergy to fill two positions like the one she currently occupies." On the other hand, "Raymond is so full of exergy that he starts ten projects at the time, then runs out of energy before he finishes any."
Etymology: A recent neologism by analogy with "energy," from Greek energeia, the noun from energos "active." Today's word would be based on ex- "from" + ergon "work," found in "ergonomics" and "surgery," from Latin "chirurgia" from Greek kheirourgia "hand-work" based on kheir "hand" + erg- "work" + ia, noun suffix. The o-grade, *org-, turns up in Greek organ "tool" and orgia "sacred rite," the origin of "orgy." The same root underlying erg-/org- became "work" in English and "werken" in Dutch.
Exergy (Noun)
Pronunciation: ['ek-sêr-jee]
Definition 1: Potential energy to do work; the useful capacity of an energy source to perform work.
Usage 1: Exergy is almost exclusively used in discussions of thermodynamics. The exergy of a tank of fuel is how much work it is capable of doing, e.g. heating a house to 72° in mid-winter. It we burn that fuel to heat a room, the amount of energy remains the same, but since it has been converted to heat and dispersed throughout the room, its ability to do useful work (exergy) has been radically reduced. The adjective is "exergetic."
Suggested usage: In its broadest meaning, today's new word refers to potential energy to do work as opposed to actual energy. So we could characterize someone as "exergetic" who has potential unused energy or if they waste energy. "Rose Marie has enough exergy to fill two positions like the one she currently occupies." On the other hand, "Raymond is so full of exergy that he starts ten projects at the time, then runs out of energy before he finishes any."
Etymology: A recent neologism by analogy with "energy," from Greek energeia, the noun from energos "active." Today's word would be based on ex- "from" + ergon "work," found in "ergonomics" and "surgery," from Latin "chirurgia" from Greek kheirourgia "hand-work" based on kheir "hand" + erg- "work" + ia, noun suffix. The o-grade, *org-, turns up in Greek organ "tool" and orgia "sacred rite," the origin of "orgy." The same root underlying erg-/org- became "work" in English and "werken" in Dutch.
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